Improved sugar evaporator



S. M. SHATTUCK.

Sugar Evaporator.

No. 62,292.- Patented Feb. 19,1867.

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SHUBEL M. SHATTUCK, OF CAMBRIDGE, ILLINOIS.

Letters Patent No. 62,292, dated February 19, 1867.

IMPROVED SUGAR EVAPORATOR.

TO ALL WHOM IT MAY CONCERN:

Be it known that I, SHUBEL M. SHATTUCK, of Cambridggin the county of Henry, and State of Illinois, haveinvented a new and improved Sugar Evaporator; and I hereby certify that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, and to the letters of reference marked thereon.

Figure l is a perspective view, with the evaporating pans removed.

Figures 2 and 3 are views of the evaporating pans.

Figure eh is a view of a plate which supports; the rear end of the front pan.

My invention consists in heating the pen in which the evaporating process is completed, by radiated heat from a peculiarly constructed radiator, and in heating the pan in which the skimming process is performed, either by radiated heat or by having the fire come in direct contact with the bottom of the pan. It also consists in providing a means by which the boiling of the juice or sirup may be stopped or regulated, by admitting a current of cool air under the pans, and without reducing the fire. To accomplish the objectof my invention, I construct a furnace over which the evaporating pans are placed, the furnace being so constructed that the fiont pan will be somewhat lower than the rear -one. I V

The walls A A of the furnace may he of cast iron, brick, or other suitable material, but for portable cvaporators it is necessary that all parts of the furnace should be of metal, and connected together in such a manner that it may he removed from place to place without being taken apart. The radiator 13, which is placed under the finishing. pen, (a space being left between it and the pan,) consists of the cast-iron pieces a a a a,

which extend across the furnace from side to side, their ends resting on supports constructed on the inside of the side walls. The pieces constituting the radiating plate B are constructed thicker or deeper at the centre than at the ends, and at th centre on their upper side a bevelled groove is formed transversely across them, through which the dove-tailed key 6 is passed, securing the pieces together and forming the radiator. The plate thus constructed extends back nearly the entire length of the front'or finishing pan, where it connects with the plate G, which extends to the rear end of the pan. The advantages in constructing the radiator B in sections, as rcprcsantcd, are that it will not be so liable to warp or spring by being heated, as if it were constructed of one solid plate, for each piece or section can expand in length independently of the others, and the manner of attaching them to the key 6 will allow them to expand laterally, each independently of the others. Another advantage is that if one section should become warped by the action of the heat it can be easily replacedby a new one, and with much less expense than the whole radiator could be replaced, which would be necessary if it were in one solid piece. At the rear side of the plate C is placed the damper d, which corresponds in size and shape with the internal size and shape of the space between the plate G and the bottom of the finishing pan. One end of the rod to which the damper is attached extends through the side wall and is bent at right angles, as shown at a, by which means the damper is operated. The plate 0 is placed under the upper or skimming pan, a space being left between it and the bottom of the pan. This plate extends from the rear end of the pan to near warp as the radiator 13 as it will not, be so intensely heated. At the front end of the plate 0 is placed a damper I), which extends forward to the damper cl, and may be turned obliquely downward or raised so as to he on a the front end, and may be constructed in one piece, as it will not be so liable to,

line with the plate C, and is for a purpose to be hereafter described. The end of the rodf, to whichthe damper .l) is attached, and by which it is operated, extends through theside wall'and is b eut at right angles. The part ,7 of the metallic plate, fig. 4, is placed-under the rear end of thelower or finishing pan, fig. 3,4ind the part h, which is turned at right angles, extends up to the front end of the skimming-pan. The skimming paii, fig. 2, 'g placed on the elevated part of the furnace, so that the bottom of it will be on a level with hr abore the t of "the finishing pan, and it is held firmly in place by the hooks z', attached to the side walls and which hoo er the pins j in the side of the pan. The finishing pan, fig. 3, is placed on the front part 'of the fiirnace ver the radiator B and plate C, and is held in place by the hooks k, which hook o'ver the pinsl in the sides-o thepam The pans may be construct-ed with the bottoms of sheet metal and sides of wood, or they maybe made entirely of sheet metal. To the rear end of the skimming pan, on, the outside thereof, is attached a. trougx m, whi h extends the entire width of the pan, and into which are thrown the skimmings, which may then be cfarried away by a spout.

\The operation of my evaporator is as follows: The pans being placed in their proper position on the furnace, and the damper oZ turned up, a fire is made on the grate 72, which heats the radiator B by coming in direct contact with it, and the radiated heat from the radiator is suflicient to boil the juice in the finishing pan but will not burn it. The damper D may be turned down, which will allow the fire to come in direct contact with the bottom of the skimming pan, the draught being through the opening F -into the flue G, or the damper may be turned up in a horizontal position on a line with the plate 0, when the fire will pass under the plate and into the flue, and the pan will be ilcated by radiated heat from the plate 0. The boiling iuthe lower or finishing pan may be almost instantly stopped without reducing the fire or interfering with the boiling in the skimming pan, by turning down the damper d, which will admit a.current of cool air to pass under the pan through the space between it and'the radiator B, and the boiling in the skimming pan may be checked without interfering with the boiling of the finishing pan by turning up the damper 1). Or the boiling in .both pans maybe stopped at the same time by turning up the damper D and turning down the damper d, which will admit a-current of cold air to pass under both pans for their entire length. This arrangement of the-dampers affords a convenient means by which the juice or sirup in the pans may be prevented from burning, or foaming, or

boiling over, without reducing the fire, and also by this arrangement the pans may beemptied and cleansed without reducing the fire, orone of the pans may be emptied and cleansed without interfering with the boiling of the other, all of'whieh is very convenient where custom work-is being done. The juice is first placed in the upper or skimming pan, where it is heated and all the impurities removed by a skimmer of the entire width of the pan, the skimming being commenced at the front end of the pan, and ending at the rear end, and the skimmer emptied into the trough 021. When all impurities are removed from the juice it is drawn through the faucet 0 into the finishing pan, where it is evaporated to the-proper consistency and drawn oil through the faucet 7) into coolers. 7

What I claim as my invention, and desire to secure by Letters Patent, is A 1. The radiator B, constructed substantially as described and for the purpose set forth.

2. The dampers D and (Z, substantially as and for the purpose set forth.

3. The plate C, in combination with the dampers D and (Z, and radiator B, substantially as described. SHUBEL M. SHATTUCK.

Witnesses:

O. E. PAGE, A. R. Moon, 

